Tank Waterproofing
Membrane tanking for concrete tanks and containment structures — water held where it belongs, and the concrete protected on both sides.
One System, Built to Work Together.
Concrete tanks work under permanent hydrostatic pressure — from the water they hold, and often from the ground around them. Cracks, joints and pipe penetrations are where they fail, and once a tank is in service those points become very hard to reach.
Insutech tanks the external faces with fully bonded bitumen membranes, protects the system for backfill, and completes details around penetrations with coatings and reinforcement strips — one compatible package around the whole structure.
- Water tanks and reservoirs
- Fire-fighting and irrigation tanks
- Sewage and treatment structures
- Industrial containment pits
- Balance tanks and plant rooms
See the System in Action.
Layer by Layer.
- 01
Structure Preparation
Tank walls and base made good, with fillets at internal corners and penetrations sealed.
- 02
Bituminous Primer
Primed concrete guarantees adhesion under permanent hydrostatic load.
- 03
Membrane Tanking
SBS or APP membranes torch-applied fully bonded across walls, base and details.
- 04
Protection Layer
Protection boards shield the completed tanking from backfill and site works.
- 05
Backfill & Finishes
The protected structure is backfilled or finished, with the system sealed for its service life.
01Sealed Under Pressure
Fully bonded membranes hold against permanent hydrostatic pressure from either side.
02No Path Behind the System
Full adhesion means water cannot track between membrane and structure to find a weak point.
03Built to Be Buried
Protected tanking survives backfill and stays serviceable where repairs are hardest.
04One Package, Every Detail
Membranes, coatings and protection boards from one source keep the whole tank compatible.
Common questions about this system.
Where is the Tank Waterproofing system used?
It is typically used for water tanks and reservoirs, fire-fighting and irrigation tanks, sewage and treatment structures, industrial containment pits and balance tanks and plant rooms.
Which Insutech products are used for tank waterproofing?
The recommended system is built with InsuPrene, InsuUltra, InsuGuard Rubber Base and Insuboard Protection Board — full details for each are on the recommended products cards on this page.
How is the system installed?
The system is installed in 5 stages: structure Preparation, bituminous Primer, membrane Tanking, protection Layer and backfill & Finishes. The system build-up section on this page illustrates the full sequence. An application video is also available above.
What are the main advantages of the tank waterproofing system?
The key advantages are sealed Under Pressure, no Path Behind the System and built to Be Buried — each is explained in the Key Benefits section on this page.